A common actuator in robotics; it's usually made of a static magnet (stator) and a set of moving inductors, acting as electromagnets, connected to the circuit through brushes. Brushless motors use phased clocks with electronic circuitry to generate motion.
0
votes
0answers
41 views
Choosing the correct brake resistor for DC motor
I have a DC motor running on 24VDC rated 150W (~6,25A), how do I calculate the correct brake resistance?
1
vote
4answers
143 views
which RPM measurement method is suitable?
I have a PMDC motor which is electronically controlled for speed. And it is a closed loop system. A proximity sensor is there to measure the speed of the motor and there are 12 bolts attached to the ...
2
votes
1answer
71 views
Control old printer motor with position ring
I purchased two old printers at a garage sale today in hopes of dismantling them and playing around with some stepper motors. After tearing both of them apart I discovered that there are no stepper ...
1
vote
1answer
124 views
Design Considerations for a dc motor drive circuit?
I'm planning to develop a control circuit for a 24V, 500 RPM (@no load), 2A, 4 kg-cm brushed DC motor. Motor has to run only in one direction. I plan to use IRF44ZN MOSFET with a proper driver to ...
1
vote
0answers
56 views
How can I use arduino to control 4 motors speed and direction?
I consider this question different from others because of the variety of things I need this setup to be able to do.
Description:
I want to build a minimalistic motor controller capable of controlling ...
3
votes
3answers
120 views
How can I safely power two 3v motors from a 9v battery?
I'm making a Sumo Bot from scratch and I had purchased two 1.5-3v DC motors from Radio Shack to run with my Arduino Uno v3. I'm using a 9v battery to power my Arduino alongside an RF receiver, Quad ...
0
votes
1answer
44 views
PWM Motor Speed Control
I recently bought one of these:
When i hooked it up to my 24v power supply and a voltmeter, it was either 0 or 24v with the POT. Nowhere in between. Why is this? Is it becasue this is a PWM device ...
2
votes
1answer
352 views
Motor shield R3 does not supply full power
I'm currently trying to build a small independent rover from my old Lego Technics set. Currently I power two 9v DC motors (2838) using an Arduino motor shield R3 in combination with an Arduino Uno. I ...
3
votes
4answers
105 views
Is this arduino motor driving circuit correct?
I got an Arduino Pro Micro and some parts to play with. I want to control a little 5v motor from an external power supply by using the Arduino to trigger a transistor. Like this:
Is that at all ...
2
votes
2answers
488 views
What is the formula for working out the volts, amps and watts of a DC Motor?
Can anyone remind of the correct way of working out the volts amps and watts on a DC motor?
I know it is something like:
\$ V=I \times R \$
\$ I=\dfrac{V}{R} \$
\$ W=\dfrac{V}{I} \$
or something ...
1
vote
3answers
99 views
Any DC-powered, low flow-rate, inexpensive water pumps?
Looking for small water pump, which can pump up water from a container, kept at ground-level to another container, placed 10 feet above ground. It should ideally be DC powered, and be able to transfer ...
5
votes
2answers
140 views
making a dc motor sing under load
I have a battery operated toothbrush that I want to generate notes with using PWM on the motor. The microcontroller used is an Arduino for testing and am able to get a bare motor to generate tones. I ...
-5
votes
0answers
43 views
Voltage overload in circuit [closed]
I'm using the circuit as shown for controlling and reversing my DC motor. When I connect my motor to the CRO, it shows a warning of 'Voltage load'. How do I solve this problem?
2
votes
1answer
48 views
How does ripples in dc affect working of a dc motor?
In the circuit provided here ,the supply voltage to the motor(+24 V ) is not a steady dc . It is the output of a full wave rectifier. how does it affect the working of a dc motor.?
3
votes
1answer
138 views
Criteria behind selecting pwm frequency for speed control of a dc motor?
I'm working on a speed control circuit for a brushed dc motor (24v, 500rpm, 2A, 4kgcm).
The main components that I plan to use are PIC16f873, 4n25 optocoupler, IRFZ44N MOSFET, BY 500 - 800 diode(for ...
4
votes
3answers
147 views
Driving Permanent Magnet DC Motor via PWM
SUMMARY:
I am currently trying to finish up a DIY project I've been working on for a while: Building an electric potters wheel. I acquired a treadmill and salvaged quite a few good parts from it, and ...
0
votes
1answer
224 views
Most efficient h bridge to run two DC motors in robotics application
EDIT: I was mistaken about the motors, I actually have a pair of DC motors
I want to construct an h bridge that would allow me to control the servos in a boebot. However, I want to maximize the speed ...
1
vote
0answers
38 views
Parallel, low noise motor driver design with L293D [duplicate]
I'm designing a very basic motor driver circuit for 12V DC brushed motors to be connected with my microcontroller. The motor needs to be driven in forward and reverse
My objective is to do that with ...
1
vote
1answer
73 views
Arduino motor shield running 2 12V 60 RPM DC motor
I'm trying to run a bot with a differential drive system and I'm using 2 12V 60RPM DC Motor and an Arduino shield along with the Arduino, along with that I'm also having an wheel position encoder ...
1
vote
1answer
96 views
Can a phone battery be used to power Arduino or Motors
I was wondering whether it would be possible to use a rechargeable battery from an ordinary cell phone to power some electronics such as a motor shield for Arduino?
Can that be done and if yes then ...
3
votes
1answer
85 views
Simple DC motor error
I had tried to make a simple homemade DC motor using 8V DC, Cu coil and a permanent magnet. But it doesn't rotate. Here are the things I did:
I made a coil with 6-7 turns using Copper wire.
...
2
votes
1answer
133 views
Using a single MOSFET to switch current direction
I am currently using a 30N06L MOSFET in order to control a DC engine from an Arduino using this circuit:
The problem is that this way I cannot change the direction of the engine.
Is there a way to ...
0
votes
3answers
663 views
Why won't my MOSFET work?
I am having trouble getting my N-channel MOSFET to work. I am using the MOSFET to control a DC motor. I have the the positive end of 5V power supply going to my motor and from the motor to the drain. ...
4
votes
1answer
99 views
Is it possible to control and reverse the direction of a dc motor through a headphone socket?
Yesterday, I found that it was possible to control a servo using a headphone socket with a fairly simple circuit.
I've got a project where I need to to control a dc motor via a headphone socket. Is ...
0
votes
1answer
247 views
Feedback for DC Motor Speed Control using PID
I'm working on a project in which I have to control the speed of a DC motor using an analog PID(using op-amps). The input will be provided with a potentiometer. The issue is that I can't figure out ...
3
votes
2answers
2k views
Algorithm for mixing 2 axis analog input to control a differential motor drive
I am looking for information about how to implement proper mixing of 2 analog joystick signals (X an Y axis) to control a dual differential motor drive ("tank like" drive) using a uC (ATMega328p in my ...
1
vote
3answers
247 views
How do I control a two 12VDC 10A motors using an Arduino?
I am new to arduino and electronics in general but I need some help on a project I am working on. Essentially I want to be able to control the state (on/off) and direction of two linear actuators that ...
1
vote
1answer
55 views
Which electro motor to use for steering a kite? (guestimation marathon)
I'm doing a pet project in which I want to fly a kite from my computer. For this to happen my plan is to build a little box hanging under the kite which includes a raspberry pi (connected to my laptop ...
0
votes
2answers
57 views
Why is this electro motor going slower?
From an old dust buster I've got this electro motor, the included battery pack and the charger:
I ripped everything apart (the dust buster was broken) and the motor still works. After playing ...
0
votes
1answer
104 views
Arduino motor shield lacking power
I am using an Arduino uno R3 with the motor shield R3 with 1 DC motor (http://www.maplin.co.uk/small-motor-3738) pluged in by the USB port (because I dont have a proper power cable). When i first used ...
0
votes
3answers
133 views
L293D maximum current with heatsink
I saw in datasheet of L293D that maximum current per channel is 650mA. I have two dc motors that draw within that limitation. Most of the time, measured current is ...
1
vote
1answer
188 views
closed loop DC motor velocity control
I'm trying to set up a closed loop control for the velocity of a DC motor. I have a small DC motor with an 8bit encoder. I'm driving the motor using PWM off an arduino and a L298N h-bridge.
Here's ...
1
vote
1answer
131 views
Reason for an RC motor to spin very slowly
I have the following motor:
GP307 Ultra Dash Motor by Tamiya.
I've read online that you can give this motor up to 16 volts. I have been putting in 11 volts and it spins very slowly, maybe about ...
2
votes
2answers
1k views
Two Wire Servo in RC Car?
I took apart an RC car recently and found 2 sets of motors. The rear wheels (left) seem to run off an electric DC motor which is understandable.
The front wheels (right) I expected to be controlled ...
1
vote
2answers
187 views
Motors controlling Arduino usb question
simulate this circuit – Schematic created using CircuitLab
I made a RC car with an Arduino board, using an H-bridge to operate the motors. I connect them through a capacitor and a diode ...
8
votes
4answers
684 views
Why use DC motors for driving elevators?
This New York Times article says that on November 14, 2007 Consolidated Edison Company was going to end supplying direct current to the remaining several buildings that used those to run elevators.
I ...
1
vote
2answers
264 views
PWM Motor speed control using PIC; What mosfet to use
I have a 5V PIC16f877a controlling the speed of the motor 12V which has a power rating of 8W; the current will be around(600mA) am I correct?
The motor is basically a small water pump commonly used ...
4
votes
2answers
75 views
Considerations For Motor Cables: what are the downsides to ribbon cable?
My friend (a Mechanical Engineering student) is building machine that uses an array of motors in an application where they are under almost no load. He showed me the thin, old, ribbon cable he intends ...
-1
votes
2answers
499 views
How to make a touch screen device with android OS?
I am planning to make a device which has a touch screen LCD. I have searched for solutions and i think if this device has android OS could be use for many applications. This device will be used for ...
6
votes
2answers
2k views
How to improve torque and RPM of a DC motor?
I have an FA-130 motor (DC) with permanent magnet, my power source is a 2 AA batteries (rechargeable) so a total of 2.4v.
Assume that all cases will start from the same specification, theoretically, ...
3
votes
3answers
103 views
DC Brushed motor lubricant
Quick question, are the brushes in a brushed DC motor supposed to be lubricated?
1
vote
0answers
64 views
dc machine with brushes covering more than one commutator segment
i'm a bit confused with the current that flows in a wave armature winding of a dc machine. In a wave winding, there are two current paths, right? what happens when the brush covers more than one ...
0
votes
1answer
478 views
Circuit to reverse polarity
I am doing a project on a door shutter opener where there are two states or signal I pass into the circuit:
0V: Door shutter closed
5V: Door shutter opens.
I plan to accomplish this via motor ...
1
vote
0answers
203 views
high torque and high rpm dc motors
I am making an electric 4x4 car, will it make a difference in overall speed if:
Case1: all 4 motors are high torque and relatively low rpm
Case2: 2 high torque relatively low rpm and 2 high rpm ...
0
votes
1answer
118 views
what type of armature i should use in 12v dc magnetic 2 pole motor to get more than 8000Rpm
i m trying to wind a motor but i am new at this so can any one can tell me how can i wind an armature to get more than 8000 Rpm in a 2 pole magnetic motor
of 12 volts
0
votes
1answer
135 views
choosing the suitable DC motors
I'm working on a 4x4 robot that is supposed to carry stuff total_mass=100kg (including the robot).
the robot should have average speed ...
-3
votes
2answers
515 views
Replacing 6v dc motor with 12v dc motor for better speed
I have a 6v battery powered kids ride-on-toy (with 6v motor). I wanted to make it move faster so I put a 12v battery with the 6v motor which made it run better. But after a while it started moving ...
4
votes
2answers
119 views
2 different batteries in single circuit
I need to use a SN754410 motor driver with a 4.5V microchip and 12V motor all running on batteries.
I want to power the microchip with 3x1.5v AAA batteries. The motor requires 12V and I want to use a ...
0
votes
1answer
417 views
High voltage H-Bridge
Does anyone know about a full H-Bridge chip that can handle input voltages somewhere in the range 80v to 100v with current rating less than 1A?
The reason I'm looking for this is that in our robot ...
1
vote
1answer
147 views
voltage divider circuit for dc motor
I would like to run a 6V dc motor using a 9v battery supply. The motor specification states that current is 150mA at 6V which I calculate to be a resistance of 40 ohms (when I measure the resistance ...
